. >> fbi agents later discovered the suspect's apartment was booby-trapped with explosives and flammable material. a number of buildings have been evacuated as agents determine a way to disarm the device is not a written several about terrorism and to say there is no clear motive for the attack. >> let's cross over to our correspondent in washington, d.c. the situation is not over yet. tell us what is happening at the suspect's apartment. >> they are still trying to figure out the booby-trap. apparently this is something that james holmes invented himself. it has a chemical and explosive elements wired together. the police have never seen anything like that, so they're very careful. they're approaching the apartment from the other side, through the window. they're holding cameras into it. the experts are trying to figure out how this works. >> this is becoming a political story now. what is being said about gun control? >> well, so far, most vocal has been new york mayor bloomberg. he is in favor of stricter gun control. he has asked the two presidential candidates, romney and obama, to